One More Thing
Have to admit, I've never worked on any RV nosegears, but did a lot of work on single engine Grummans with a similar nosegear. Along with breakout force on the steering bearing (very important) and wheel bearing preload, (almost as important) I used to check wheel and tire balance just by raising the nosewheel off the ground and loosening the wheel bearings until they spun as freely as possible. Then spin the wheel and watch where it stops. (you can add a chalk mark to help orientation) Repeat a few times. If it rocks back and forth and then stops, the balance is 'way off. I add stick-on weights from the auto parts store to at least get it closer. I was happy when the wheel stopped at random clock angles. Kind of rough, but it seemed to help. Then reset the bearing preload and fly. Actually, I do this on the main wheels of our RV-6, too. Seems like all the wheels on our RVs are at the end of long springs. Hope this helps!